Aging and Self-possession

Aging noun - The organic process of growing older and showing the effects of increasing age.

Self-possession and aging are semantically related. In some cases you can replace phrase "Self-possession" with "Aging", this terms are similar.

Self-possession noun - Evenness of emotions or temper.

Aging and self-possession are semantically related. Sometimes you can use "Aging" instead a noun phrase "Self-possession".